Grouser



1 647,01 Oct. 25, 1927. T. Gu SCHMESER 9 GRCUSER Filed March 50. 1927 Y INVENTOR Y Meana/wr Jaws/.rea

l W l v ATTORNEYS` lli:

Patented @et 25, 1927.

STATES THEODDRE Gf. SCHMEISER, 0F SAN FRNCISCO, CALIFORNIA.

GRUSER.

Application'led March 30, 19.27. Serial No. 179,537.

The present invention relates to improvements in grousers and has particular reference to grousers adapted to be used in connection with the traction wheels of a tractor. My invention has particular reference to a grouser intended to he used on the wheel of the Fordson tractor which presents on the surface thereof a series of diagonally arranged holes for receiving bolts for fastening the grousers thereto.

ln the present invention it is proposed to present a grouser which is particularly strong in construction in the points most subject to wear, and for this purpose l pro-` pose to provide a wedge-shaped grouser having a large portion of the material crowded into the tip While being hollow7 at the base and the intermediate portion, so that the tip substantially balances the base in Weight. It is further proposed to provide certain improvements in the means for fastening the grouser to the traction wheel, the principal novel feature being that the ianges adapted to receive fastening` bolts are arranged within the outlines of the grouser and do not project therefrom s0 that they may not be knocked ofi'. Further objects and advantages of my invention will appear as the specification proceeds.

rllhe 'preferred form of my invention is illustrated in the accompanying drawing, in which:

Figure l shows an end view of my grouser as attached to the rim of a traction wheel;

Figure 2 shows a front view thereof;

Figure 3 shows a vertical section taken along line 3-3 of Figure 2;

Figure 4 shows a bottom plan view of my grouser; and

'Figure 5 shows -a top plan view of the same.

slightl While I have shown only the preferred form 'of the invention, I wish to have it understood that various changes or modifications may be made within the scope of the claims hereto4 attached withoiit departing from the spirit of the invention.

In its preferred form, my grouser 1 1s preferably a wedge-shaped pyramid 1n its general outlines, so as'to present a base .2, surface elements 3 and a tip 4, the base being curved to correspond to the curvature o the rim 6 of a traction wheel.. The side surface elements or working faces 3 are formed to present a compound curve in the manner of a sinuous curve, the convex-component of the curve being at the apex portion whereby thethickness of the metal is` increased toward the tip and the concave component of the curve extends toward the base ofthe grouser to provide better and quicker clearance for the grouser.

The grouser is made hollow as shown at 7 and presents inner walls running substantlally parallel to the outer walls throughout the base and intermediate portion of the grouser, while the tip portion is made solid as shown in the drawing;the solid portion including substantially one-third to two! fifths of the height of the grouser. The inner walls of the grouser meet along a curved line 8 spaced from thetip in the manner afbresaid. v

Diagonally opposed corners of the grouser are recessed as shown at 9 to provide seats 1l for the heads l2 of bolts v13 extending through perforations in the'sai'd seats and registering perforations 14 in the wheel rim so as to allow the grouser to be fastened to the wheel rim by means of nuts 16 threaded on the inner ends of the bolts, spring washers 17 being preferably interposed between the nuts and the rim. It will be noted that the recessing of the corners of the grouser allows the seats 11 to be substantially con fined within the outlines of the grouser so that they do not project from the grouser and do not offer any point of attack to a force attempting to break them away from the grouser.

lIt will further be noted that the vwalls of the recesses 9 are arranged at right anales as shown particularly well in Figures rd 5, so that the walls serve as a stop for the bolt head, and prevent the latter from turnmg. i i

Grousers of this character are reversible, and may be turned about after one face is worn down. They are not interchangeable from one wheel to another, since in the standard arrangement oftraction wheelsY the series of holes for fastening the grouser are not arranged parallel in a pair of wheels, but along intersecting lines;

It will be understood that grousers of this character are less Subj ect to wear than grousers withstraight surface elements, since the bulk of the material is crowded into the tip portion, and my grousers may be used for a long time before the curvature wears out, While furthermore the'period of usefulness may be doubled by reversing the grousers.

. The fact that the seats are arranged Within acter described havingopposite edges recesse'd to present seats for the heads of bolts extending through perforatons in said seats, said recesses being substantially conned in the outlines of the base of the wedge portio of the grouser. I

3. A Wedge shaped grouser of the character described having diagonally opposite edges recessed to present seats for the heads 'of bolts extending through perforations in said seats, the Wallsof the recesses being arranged atan angle to prevent said heads from'turning, said recesses lying Within the confines of the base of the wedge.

THEODORE G. SCHMEXSER. 

